2003 Expedition Rough Idling

2003 FORD EXPEDITION
125,000 MILES • V8 • 4WD • AUTOMATIC
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JB99
  • MEMBER
  • 1 POST
Once the car warms up, I will at a stop and the engine begins to idle roughly, sometime to the point of stalling. It seems to idle better if I put it in neutral.

It runs fine when I'm moving. I havent noticed any performance loss at speed.

Any idea what the source of this may be?
Dec 23, 2010 at 10:17 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
It could need a tune up, have a vacuum leak, a weak coil... If the check engine light has come on, have the computer scanned for trouble codes. Also, check for vacuum leaks. Behind the throttle body is a vacuum hose that has a 90 degree bend in it. Check to make sure it isn't leaking. They dryrot and cause problems.
Jan 21, 2011 at 9:48 PM
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